TM 9-2320-260-34-2
15-58. LIFTGATE CONTROL VALVE REPLACEMENT (M820A2)
THIS TASK COVERS:
b. Installation
a. Removal
INITIAL SETUP
REFERENCES (TM)
APPLICABLE MODELS
LO 9-2320-260-12
M820A2
TM 9-2320-260-10
TOOLS
TM 9-2320-260-34P-2
General mechanic's tool kit
EQUIPMENT CONDITION
q Parking brake set (TM 9-2320-260-10).
MATERIALS/PARTS
q Liftgate lowered to ground level
(TM 9-2320-260-10).
q Control linkage removed from control valve
q Drain hydraulic system (L0 9-2320-260-12).
a. Removal
CAUTION
Clean area around hoses and lines before removal to prevent
q
entry of dirt. Damage will occur if dirt or dust enters system.
Cap or plug all openings immediately after disconnecting lines
q
NOTE
Tag all hydraulic lines for installation.
Have drainage container ready to catch hydraulic oil.
1.
Disconnect hydraulic hoses (13) and (17) from control valve (3).
2.
Disconnect hydraulic hoses (15) and (16) from two connectors (14).
Disconnect hydraulic hoses (11) and (12) from two tees (10).
3.
4.
Remove three nuts (9), screws (1), Iockwashers (2), and control valve (3) from main frame
mount (4). Discard Iockwashers (2).
Disconnect hydraulic lines (5) and (7) from adapter (6) and tee (8).
5.
N0TE
Perform steps 6 through 8 if replacing control valve.
6.
Remove two connectors (14), flow control valve (23), and nipple (22) from two tees (10).
Remove two tees (10) and nipples (21) from control valve (3).
7.
8.
Remove adapter (6), tee (8), nipple (20), and elbows (18) and (19) from control valve (3).
Perform steps 1 through 4 if installing new control valve.
1. Wrap male threads on hydraulic hoses (5), (7), (11), (12), (13), and (17), connectors (14),
nipples (20), (21), and (22), adapter (6), and elbows (18) and (19) with antiseize tape.
2. Install elbows (18 and (19), nipple (20), tee (8), and adapter (6) on control valve (3).
3. Install two nipples (21) and tees (10) on control valve (3).
4. Install nipple (22), flow control valve (23), and two connectors (14) on two tees (10).
15-224